diff --git a/python/jupyterlab_widgets/README.md b/python/jupyterlab_widgets/README.md
index 4a1e158339..5898a45e8d 100644
--- a/python/jupyterlab_widgets/README.md
+++ b/python/jupyterlab_widgets/README.md
@@ -1,10 +1,10 @@
 # Jupyter Widgets JupyterLab Extension
 
-A JupyterLab 3.0 extension for Jupyter/IPython widgets.
+A JupyterLab extension for Jupyter/IPython widgets.
 
 ## Installation
 
-To enable ipywidgets support in JupyterLab 3.x:
+To enable ipywidgets support in JupyterLab 3.x or 4.x:
 
 ```bash
 pip install jupyterlab_widgets
diff --git a/python/jupyterlab_widgets/pyproject.toml b/python/jupyterlab_widgets/pyproject.toml
index d8bda2e1ff..f7aae5e90a 100644
--- a/python/jupyterlab_widgets/pyproject.toml
+++ b/python/jupyterlab_widgets/pyproject.toml
@@ -27,6 +27,7 @@ classifiers = [
     "Framework :: Jupyter",
     "Framework :: Jupyter :: JupyterLab",
     "Framework :: Jupyter :: JupyterLab :: 3",
+    "Framework :: Jupyter :: JupyterLab :: 4",
     "Framework :: Jupyter :: JupyterLab :: Extensions",
     "Framework :: Jupyter :: JupyterLab :: Extensions :: Prebuilt"
 ]